feat(sponsorList): add 'Designed by' remark component

This commit introduces a new 'DesignedRemark' component to display an attribution link.

- Adds the Pacifico font for custom styling of the remark.
- Creates and registers the global `DesignedRemark` Vue component.
- Integrates the component into the mobile sponsor list page.

20251115/sponsorList/mobile/script.js

@@ -7,6 +7,10 @@ const SponsorCard = {
   template: "#sponsor-card-template",
 };
 
+const DesignedRemark = {
+  template: "#designed-remark-template",
+};
+
 const app = createApp({
   setup() {
     const eventTitle = ref("");
@@ -291,5 +295,6 @@ const app = createApp({
   },
 });
 
+app.component("designed-remark", DesignedRemark); // 全局注册
 app.component("sponsor-card", SponsorCard); // 全局注册
 app.mount("#app");